Fabric dilemma

[celamity]

I know very little about fabric. I don't know which are stretchy, drapey, heavy, work with chiffon, need lining, feel hot, etc. etc.
I am having an off-white copy made of Arwen's mourning gown, in not necessarily stretch velvet due to difficulties finding light shades of velvet. (CrimsonVision in the sidebar is my future seamstress :) )
I had little luck finding a good velvet color in local fabric stores, so I am looking online, and at other fabrics (criteria: a little stretch, drapey, not shiny)
The monitor is old, and doesn't show color very well.
I hate yellow ivory. I want something almost but not quite white.

Hence, I need a verdict on the colors (and suitability, for those of you who know fabrics) of the following:

Ivory stretch velvet

Winter white stretch velvet

Off white triple velvet (says it won't stretch; I don't know what the characteristics of triple velvet are)

Ivory peachskin (suspect it's a very wrong fabric type but the pic looked pretty)

Diamond white satin d'hauteur

Diamond white satin charmeuse

Diamond white and ivory crepe backed satin (for some reason the ivory looks the less yellow on my screen)

White silk crepe de chine

Yes, I am looking at all kinds of possibly insane options here :)
They offer cheap samples, but I am trying to limit how many I get and I'm already planning on getting a ton of red ones, so I am trying to rule out some stuff.

Oh, and would sheer sleeves be weird on something like this?